- Re-assign all my rubygem-* ports to ruby@
this gives us more eyes and brings us inline with perl@
Current ruby@ members (stas, dinoex, pgollucci)
http://wiki.freebsd.org/Ruby
Discussed with: stas on #bsdports

- Add ruby 1.9 support
- Implement new knobs for gems and rake (these are included in
ruby 1.9 distribution already). Also move gem bits from
ruby-gems/Makefile.common to bsd.ruby.mk[1]. Now to depend
on gems or rake you should define USE_RUBYGEMS/USE_RAKE
accordingly. Also RAKE_BIN variable is provided for
pointing to the right rake executable.
- Rewrite RUBY_SCHEBANG in awk to eliminate build dependency
on ruby.
Discussed with: Jonathan Weiss <jw@innerewut.de> [1] (gems maintainer)
Tested by: ports@